I use Udo's Choice Infant's Probiotic. I get it from iherb.com and upgrade the shipping. They ship all probiotics on ice in a mini-cooler to protect them. Even with all that since their prices are so great it is still cheaper than Whole Foods.

__________________Lauren full-time student and mama to Xander (6 years) and Amira (2 years)"The days are long but the years are short"

Thanks mamas!!
Julie, where do you buy what you use? Ds has tried several reg. formulas, soy, alimentum, nutramegin, and is currently on neocate (which he does best on).. he has severe silent reflux though so I don't think our issues will be solved, but I do know his little digestive system is immature and sensitive along with having a strong MSPI, so I want him on a good probiotic too.
Thanks a bunch!